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README
metrics: A generic interface to different metrics systems in Erlang.
Copyright (c) 2017-2018 Benoît Chesneau.
Version: 2.5.0
metrics
A generic interface to folsom, exometer, grapherl or any compliant interface. This application has been extracted from hackney.
Currently supported backend are:
If you need the support for another backend, please open a ticket.
Usage
Set a backend
The backend can be set in the application environment using the metrics_mod
setting or using metrics:backend/1
.
register a new metric:
metrics:new(counter, "c").
Depending on the backend the following metrics types can be passed: counter | histogram | gauge | meter | spiral
update a metric
A counter can simply be incremented by 1 using metrics:update/1
. or by passing a positive or negative integer like this:
metrics:update("c", {c, 1}).
Other metrics are updated via metrics:update/2
.
Example:
1> application:ensure_all_started(metrics).
{ok,[metrics]}
2> application:ensure_all_started(folsom).
{ok,[bear,folsom]}
3> metrics:backend(metrics_folsom).
ok
4> metrics:new(counter, "c").
ok
5> metrics:update("c").
ok
6> folsom_metrics:get_metric_value("c").
1
7> metrics:update("c", {c, 1}).
ok
8> folsom_metrics:get_metric_value("c").
2
Documentation
Full doc is available in the metrics
module.
Build
$ rebar3 compile
Modules
metrics metrics_exometer metrics_folsom metrics_noop metrics_process_tracker metrics_sup